kc3-lang/angle/src/compiler/translator/blocklayoutHLSL.cpp

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• Hash : 90a58622
  Author :
  Date : 2019-09-04T15:39:58
  

  Refactor ShaderVariable to Remove Specializations
  
  The following structs are being refactored and moved into the parent
  struct ShaderVariable:
  
  VariableWithLocation
  Uniform
  Attribute
  OutputVariable
  InterfaceBlockField
  Varying
  
  Bug: angleproject:3899
  Test: CQ
  Change-Id: I389eb3ab4ed44a360e09fca75ecc78d64a277f83
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1785877
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
  Commit-Queue: Tim Van Patten <timvp@google.com>
  

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• src/compiler/translator/blocklayoutHLSL.cpp

• //
  // Copyright 2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // blocklayout.cpp:
  //   Implementation for block layout classes and methods.
  //
  
  #include "compiler/translator/blocklayoutHLSL.h"
  
  #include "common/mathutil.h"
  #include "common/utilities.h"
  
  namespace sh
  {
  
  HLSLBlockEncoder::HLSLBlockEncoder(HLSLBlockEncoderStrategy strategy, bool transposeMatrices)
      : mEncoderStrategy(strategy), mTransposeMatrices(transposeMatrices)
  {}
  
  void HLSLBlockEncoder::enterAggregateType(const ShaderVariable &structVar)
  {
      align(kComponentsPerRegister);
  }
  
  void HLSLBlockEncoder::exitAggregateType(const ShaderVariable &structVar) {}
  
  void HLSLBlockEncoder::getBlockLayoutInfo(GLenum typeIn,
                                            const std::vector<unsigned int> &arraySizes,
                                            bool isRowMajorMatrix,
                                            int *arrayStrideOut,
                                            int *matrixStrideOut)
  {
      GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);
  
      // We assume we are only dealing with 4 byte components (no doubles or half-words currently)
      ASSERT(gl::VariableComponentSize(gl::VariableComponentType(type)) == kBytesPerComponent);
  
      int matrixStride = 0;
      int arrayStride  = 0;
  
      // if variables are not to be packed, or we're about to
      // pack a matrix or array, skip to the start of the next
      // register
      if (!isPacked() || gl::IsMatrixType(type) || !arraySizes.empty())
      {
          align(kComponentsPerRegister);
      }
  
      if (gl::IsMatrixType(type))
      {
          matrixStride = kComponentsPerRegister;
  
          if (!arraySizes.empty())
          {
              const int numRegisters = gl::MatrixRegisterCount(type, isRowMajorMatrix);
              arrayStride            = kComponentsPerRegister * numRegisters;
          }
      }
      else if (!arraySizes.empty())
      {
          arrayStride = kComponentsPerRegister;
      }
      else if (isPacked())
      {
          int numComponents = gl::VariableComponentCount(type);
          if ((numComponents + (mCurrentOffset % kComponentsPerRegister)) > kComponentsPerRegister)
          {
              align(kComponentsPerRegister);
          }
      }
  
      *matrixStrideOut = matrixStride;
      *arrayStrideOut  = arrayStride;
  }
  
  void HLSLBlockEncoder::advanceOffset(GLenum typeIn,
                                       const std::vector<unsigned int> &arraySizes,
                                       bool isRowMajorMatrix,
                                       int arrayStride,
                                       int matrixStride)
  {
      GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);
  
      if (!arraySizes.empty())
      {
          unsigned int arraySize = gl::ArraySizeProduct(arraySizes);
          if (arraySize > 0)
          {
              mCurrentOffset += arrayStride * (arraySize - 1);
          }
      }
  
      if (gl::IsMatrixType(type))
      {
          ASSERT(matrixStride == kComponentsPerRegister);
          const int numRegisters  = gl::MatrixRegisterCount(type, isRowMajorMatrix);
          const int numComponents = gl::MatrixComponentCount(type, isRowMajorMatrix);
          mCurrentOffset += kComponentsPerRegister * (numRegisters - 1);
          mCurrentOffset += numComponents;
      }
      else if (isPacked())
      {
          mCurrentOffset += gl::VariableComponentCount(type);
      }
      else
      {
          mCurrentOffset += kComponentsPerRegister;
      }
  }
  
  void HLSLBlockEncoder::skipRegisters(unsigned int numRegisters)
  {
      mCurrentOffset += (numRegisters * kComponentsPerRegister);
  }
  
  HLSLBlockEncoder::HLSLBlockEncoderStrategy HLSLBlockEncoder::GetStrategyFor(
      ShShaderOutput outputType)
  {
      switch (outputType)
      {
          case SH_HLSL_3_0_OUTPUT:
              return ENCODE_LOOSE;
          case SH_HLSL_4_1_OUTPUT:
          case SH_HLSL_4_0_FL9_3_OUTPUT:
              return ENCODE_PACKED;
          default:
              UNREACHABLE();
              return ENCODE_PACKED;
      }
  }
  
  template <class ShaderVarType>
  void HLSLVariableRegisterCount(const ShaderVarType &variable, HLSLBlockEncoder *encoder)
  {
      if (variable.isStruct())
      {
          for (size_t arrayElement = 0; arrayElement < variable.getArraySizeProduct(); arrayElement++)
          {
              encoder->enterAggregateType(variable);
  
              for (const ShaderVariable &field : variable.fields)
              {
                  HLSLVariableRegisterCount(field, encoder);
              }
  
              encoder->exitAggregateType(variable);
          }
      }
      else
      {
          // We operate only on varyings and uniforms, which do not have matrix layout qualifiers
          encoder->encodeType(variable.type, variable.arraySizes, false);
      }
  }
  
  unsigned int HLSLVariableRegisterCount(const ShaderVariable &variable, ShShaderOutput outputType)
  {
      HLSLBlockEncoder encoder(HLSLBlockEncoder::GetStrategyFor(outputType), true);
      HLSLVariableRegisterCount(variable, &encoder);
  
      const size_t registerBytes = (encoder.kBytesPerComponent * encoder.kComponentsPerRegister);
      return static_cast<unsigned int>(
          rx::roundUp<size_t>(encoder.getCurrentOffset(), registerBytes) / registerBytes);
  }
  }  // namespace sh
  

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